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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of La Porte

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20151.43 ppb165ND - 5.10 ppb
20162.18 ppb168ND - 5.80 ppb
20170.306 ppb161ND - 4.90 ppb
20180.650 ppb164ND - 3.40 ppb
20192.33 ppb169ND - 5.30 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-10AC41901ND
2014-02-10AC41897ND
2014-02-10AC41909ND
2014-02-10AC41908ND
2014-04-04AC49590ND
2014-04-04AC49575ND
2014-04-04AC49573ND
2014-04-04AC49576ND
2014-08-22AC65113ND
2014-08-22AC65116ND
2014-09-25AC68298ND
2014-09-25AC68319ND
2014-12-12AC74878ND
2014-12-12AC74871ND
2014-12-12AC74877ND
2014-12-12AC74881ND
2015-01-26AC77722ND
2015-01-26AC77720ND
2015-01-26AC77736ND
2015-01-26AC77741ND
2015-04-07AC87429ND
2015-04-07AC87432ND
2015-04-07AC874384.60 ppb
2015-04-07AC87434ND
2015-07-21AD003714.40 ppb
2015-07-21AD003705.10 ppb
2015-07-21AD00354ND
2015-07-21AD003724.80 ppb
2015-12-02AD15147ND
2015-12-02AD15128ND
2015-12-02AD15145ND
2015-12-02AD151434.00 ppb
2016-01-20AD189003.70 ppb
2016-01-20AD188994.10 ppb
2016-01-20AD188945.00 ppb
2016-01-20AD18896ND
2016-04-12AD327752.60 ppb
2016-04-12AD32782ND
2016-04-12AD32776ND
2016-04-12AD32754ND
2016-07-15AD445084.10 ppb
2016-07-15AD445045.30 ppb
2016-07-15AD445234.20 ppb
2016-07-15AD444915.80 ppb
2016-10-04AD52435ND
2016-10-04AD52465ND
2016-10-04AD52459ND
2016-10-04AD52467ND
2017-01-18AD65316ND
2017-01-18AD65322ND
2017-01-18AD65323ND
2017-01-18AD65317ND
2017-05-01AD81791ND
2017-05-01AD81794ND
2017-05-01AD81789ND
2017-05-01AD81792ND
2017-07-17AD89463ND
2017-07-17AD89474ND
2017-07-17AD89476ND
2017-07-17AD89475ND
2017-11-16AE05150ND
2017-11-16AE051514.90 ppb
2017-11-16AE05153ND
2017-11-16AE05152ND
2018-01-29AE10925ND
2018-01-29AE10926ND
2018-01-29AE10917ND
2018-01-29AE10927ND
2018-04-13AE22496ND
2018-04-13AE22458ND
2018-04-13AE22455ND
2018-04-13AE22457ND
2018-08-15AE371852.20 ppb
2018-08-15AE37187ND
2018-08-15AE371882.50 ppb
2018-08-15AE371862.30 ppb
2018-10-29AE44710ND
2018-10-29AE447093.40 ppb
2018-10-29AE44707ND
2018-10-29AE44708ND
2019-02-22AE556294.00 ppb
2019-02-22AE556313.50 ppb
2019-02-22AE556304.30 ppb
2019-02-22AE556323.60 ppb
2019-04-01AE60653ND
2019-04-01AE60654ND
2019-04-01AE60655ND
2019-04-01AE606562.60 ppb
2019-07-10AE73865ND
2019-07-10AE73869ND
2019-07-10AE73864ND
2019-07-10AE73866ND
2019-10-10AE862765.10 ppb
2019-10-10AE862735.30 ppb
2019-10-10AE862744.30 ppb
2019-10-10AE862754.50 ppb